Driving-gear for motor-vehicles.



T. F. EVANS. I DRIVING GEAR FOR MOTOR VEHICLES.

APPLICATION FILED MARJO, 1909.

Patented Aug. 4, 1914,

4 SHEETSSHEET 1.

T. F. EVANS.

DRIVING GEAR FOR MOTOR VEHICLES. APPLICATION FILED 1,512.20, 1909.

Patented Aug. 4, 1914.

4 SHEETS-SHEET 2.

T. P. EVANS; DRIVING GEAR FOR MOTOR VEHICLES.

QAPILICIATION FILED MAR. 20, 1909.

Patented Aug. 4, 1914.

4 SHEETSSHBET 3.

,zawenzz m Z4,

4 FEW.

T, P. EVANS.

DRIVING GEAR FOB. MOTOR'VEHIGLES. APPLIUATIOH FILED 1210,1909.

4 SHEETS-SHEET 4 1,105,640. Patented Aug. 4, 1914.

v /5 i v '5 [619K57- jfzyemz afi (J 10174 6 1Q. um

ossios.

AS ERANGIS EVANS, 93E VJELMSLOW, ENGLAND.

ERITHE%GEAR F633, MGTQB-FFEEIGLES.

Specification of Letters Patent.

- v *1 s e Augie, -2

.spplication filed g 'arch 20, 1969. Serial No. 484,734.

Be it known FRAIICIS EVAYQ LDLYIHQOY. a s'uljcct of the King ot theiteil l": [l of ii T) 'itoin illlLi Ireland. and Bunk. Knutsfori'lltozul. \Tiimslow, in El. ounty of invention are to proride more eocicnt. trustworthy and Qi'rilYElb ient friction iillti auxiliarymechanism tor transmit g in n to the driving Wheels of In tor 1 .1: r1 cmorn Lino ellllbilllii used to it of the tlilfiDij tively t hithertobeen provided ant scoring; to "e applied in lllQL-Of-Lill.

cles and manipulated in use with greater convenience and silvzintogethan has been possible with the forms of such gen-ring hithertoprovicleei and the mechanism provided for the manipulation thereof.

The objects and advantages proposal to be ztccomplished and obtained bythe zigplication of the said improvements will he made more t'ullyapparent in the description followin ln the accompanying drawings a formof frictiongearing and suxilierj mechanism provided in accordance withthis invention and the application thereof to a motorclriven vehicle areshown by Way of example in illustration .of this invention and themanner of carrying it into eliect.

In the Sziicl .(h aWin' s throughout Which the same letters of reierenceare employed to indi ate corresponding parts, Figure 1 is a partialtransverse section token on the plane indicated the. line A E- of l 2,3, 6 and F, is a partial vertical secwheels to he adj tion on the liineindicated. by the iine'll-B i certain parts in the direction ins ow tsdicotetl h in port a ili fi11'lln12iilQ side elm import :1 dis icsection taken on the plane indi e line ilk-D oj "7 and Fig. 7 lomersnnnstic partial plan.

8 Z1 pat see :ion tziltcn on the plane indicated by ine A) of Fig. 2,showing scnieot the employed and the parts cgirrying them more fullythan is possible i. ithout confusion in Fig. l. Fig. 9 is partly alongitudinal section through the c .t the apparatus inil por al" :1shot-ring the co ns on in every figure certain parts indie (iQlSCWllQl'Q are omitted for greater clearncss of iilnstrntion of otherparts.

o are friction disks to be connected to the ii ring wheels 6 I atopposite-sides of =3. niotoril ivcn re. icle.

situate at op gosite sides of c are rollers the axes of the ticks a 7)and provided to be brought olterno ely into engegenier' one or other thefriction disks 1 Y The rollers c f ore, eccording to Yention. mounted toturn with anti capshle of being moved in opposite I. 2| 4. tionslengthwise ol 5. shalt; which 1 t with pro rerol ve and to blocks Z mmounted v guides Z provided upon a is mounted to turnthro gh on are ona. tubular guide 2' cgiried. by a casing 55, inclosing the frictiondisks a b, the rollersef and some prints of the (leyices used with-them.in the case illustrated the shaft g extending through the one end of thecasing 5, is nectecl in any suitable way as for instance, by means of ashaft 11 which, though shown dingtnmn stict lly as gisolid shaft, ispreterably a telescopic shaft ns ordinarily iisetl in motor-drivenvehicles and is connected by of a universal joint to t suitable part, asfor example, a shaft 12 of the motive agent. so that both rollers erevolve together always in one direction and by being made to bearagainst the disks a 7) respectively or against the disks 6 arespectively will cause them to revolvenin one direction or in theopposite direction.

According to this invent-ion the disks a 9 1flf.(l% to nfioril a spaceWidening in a ction transverse both to the sizesof the (liens and to the,of the rollers from a pit of least Width for the play of the rollers tocirive them. This Widening only be ohtsinecl and he directed in anysuits-ole way but inthe QttSG illustrated is directed pws rd andobtained by the disks e- Z) being also according to this inventioncanted or intoward the edges. The frame it iscapable of being turnedabout the tubular guide 6 into position either to bring the rollers e fagainst the disks a b res actively or to bring the rollers e j against te disks Z) a respectively, the shaft 9 sliding in the rollers e f andthe blocks lm in the movement. Springs n are provided to press in thedirections of the guides j is down upon the blocks Z m and so to keepthe rollers e f in proper contact with the friction disks a 6 while atwork and to preventwear from interfering with the action of the frictiongearing.

The springs n and the slight lay inevitable or easily allowable in thetting of the parts of the mechanism to workvto ether and especially inthe fitting of the bloc lm in the guides j is, also allow the-rollerse fto be raised separatel or togetheri by the shaft g being tilted a outone or otherof two parts, that is to say, about the parts respectivelybearing-in the blocks lam or being moved 'up and down as awhole, theraising of either roller 0 or f being-ineither case transverse to themovements in.- which it is moved radially to either of thedisks a b.

"91' from one. of such disks totheother.

'[ Within the limits deterniinedby the form and cantingof the disks ab,-any upward or downward movement of either roller e or-f although itis simply a vertical movementwill take it away from or bring it nearerto the disksa b and thus the farther either roller- 6 or f is presseddown toward approximately the position in which ,its axis is most nearlyradial .to the axis of the disk 2 or 6 against which it bears, the morestrongly will it bear against such disk.

The rollers e. f being pressed against the friction disks (2 I) while inaction. tend to be moved upward and so the disks a b and rollers cf-serve to press upward and so to sup port Wholly or in part the frameit and the several parts carried by it and enable the weight of'theseparts to be utilized in secur-' ing eflicient driving contact of therollers e f against'the disks a l), the upward movement' of the frame72, being, as will hereinafter be further explained, limited by means-ofthe casing 5. v

The increasingly or more acutely-conical form given to the disks a btoward'the edges has important advantages .in comparison with the use ofplane inclined disks or merely conical dis f whether inclined or not.One of these advantages of the inert-singly or more acutely conical formgiven to the disks toward the edges is that it enables true rollingcontact'or an approximation as close asxlesirable to true. rollingcontact between the rollerse and: the disks to be obtained at the outerparts of the disks (1 b where most necessary as well as making possibleeflicien't contact throughout the parts by which. they transmit motionby friction". Another of these advantages of the increasin gly or moreacutely conical form given to the-di ks a 2) toward the edges is that'itenables t he radial movement of the rollers e 7 relative to the disks ab to be effected along I with the movement of the rollers toward andfrom the disks a b as will more clearly appear later in thisdescription. The rollers e f are preferably of a conical 'form fittingthemto roll in approximately true rolling I contact against the outerpartsof the disks late to the rear axle 6 and is h in any suitable wayby the axle 6, as for example by means of parts of dust-excluding 7cases, and are provided. with toothed wheels in gear with toothed,wheels fast with the driving wheels '0 d; If, as in the case illustratedin the drawings-,thejfriction disks be parallel to the driving wheels 0al rcsp'ec- .tively, the connection between themmay be easily-made by,for vwample, spurj gearing' or chains and if the disks a b benot'parallel v to the driving wheels, as, for example,-by the,drivingwheels not be'mg canted, bevel wheels of slight or very moderatetaperwill serve or other suitable; gearing or jointed transmission devicesmay serve. the shafts 7 is furnished with aball-thrustbearing 9 tosupport theirictiondiskua or 'b s mounted upon it against the lateralpressure ,of therollersc f.

In'order that the'frame'h' maybe moved about the center line of theguides}? bring the rollers c 7 into contact with thy-disks j a b.respectively orinto contact with the disks 6 a: respectively, and, inthe case illus:

trated, also to efi'ect the movement of the rollers e f radiallyrelativelyto the disks a b in order to adjust the speed of the disks a brelatively to the speed of the rollers e and the motor, an arm 19 issecured tothe frame 72, and connected by a rod 20 to an arm fast upon ashaft provided with a lever 21 mounted in a position. convenient for op;1

erat ion by the driver. I

In order that the shaft 9 maybe tilted about the part bearing in theblock'l or the partbearing in the block myrods 0 p mountpo ed to be slidup anddbwn in the frame k are connected at theirupper ends to the blocks1 m respectively and their lower ends are brought respectively overtappets vg/ a. i "or over tap-pets s 21 according as the frame it isturned into position to'bring the rollers i e j againstthe disks a brespectivelyor'into' positionto-bring the rollers c f agaii st the 5steering; wheels 18 are turned to guide the disks F) a respectively. Thetappets g 7 8 2 hand Wiii be accompanied by turning oi: the" are shownin Figs. 2, and 6 mounted upon shafts .2 respectively in the directionsoppivots in brackets or supports provided on posite to those indicatedby the arrows F the interior of the casing 52nd cams u '2: Q1) .2 andtile ee s 1g the tzipgiet by the cam Q5 in the form sipprosimatel ofsectois of Wiililtllilfi 'ziising the and block I0 rings are mountedbeneath the teppe'ts g e r7 5 an isting the roller 6 iii-mil the diski'espectii'eljr so as when turned iii nope? a. oowever ti? roliers e eagain tile sections to raise such tappets g 7 s :5 respecdisks Zrespectively and consequently the tiieiy from the position in which theyrods are over the tnppets .s 1/ respeeiively,

1o indicated or to allow them to return to that movement of the steeringwhee s 18 to guise position after being raised. The cams a: the vehicleto the right hand will he accomare simiiar to and directed oppositely tothe Toenied by turning -she she ts 7 2 yespeo earns e" '1) respectively.The cams u Q0 are tively in the diieetions indicated by the arnioimtedzest on a shaft y capable of rows F the raising; of the tuppet s 15oseiiieted in bearings screwed or otherwise by the c .4 is with theeiiect of i'aising the secured in the casing 5 and the earns s :0 arerod 0 and block Z and disengaging the roller mmm fid fast On 11 shaft 2also capa le i 320111 the disk F) and movement of the steerbeingoscillated in th casing 5 and arms 1-3 in wheels 18 to g .ide thevehicle the left "fast upon the shafts y are connected to lmnl Wili benee-on" aziied by turning of the so rod 1% and thereby connectedtogether and snafis 3/9 yespgctj 1 i 1 Iii ggfigng rto an arm 15 whichis furnished with, a slot posite to those in' t l by the arrows *1 "toreceive a stud fixed in the rod and ilflfii the raising o1 ppet, Z by:he can erried by shift 16 mounted shearing with the cf of raising t oneside of the casing 5 and a rod 1? conblock m and ii nested a? one end tothe arm 15 is connected th friction a, 111 :ns way tne some so to r.convenient past of the steering meeiien dri i w eel i enabled to bedisengage nism of the motor driven veliicie so that the from the mo agenfor she more easy shafts y 2 siisil be turned TBSPQCtiVlf J in; turningof a. corner, w sezievei" the steeri the direet ions indicated by thearrows F; wiiggig r tm eo t g ide the veiiie 30 when h Wheels 18 turnedE 11()1i1i(i21 301f*= on the SQTiiG: hand Trn l 'guide the vehicle tothe riglit hand Whether? given i aeivveid,

fosword or loackwerdend shall be turned I Order @52 w, j may be moved uprespeotrcely in the directions Oi'JlDOSlUi to: and down as is "hown inFr s. 1., those indicated by the HTZOWS E when the *h of "ods i the sireblock: 106

sod Q noimteo. to turn u 7 vii vehicle i0 the leiithand wliesiier:orvmrd op )0 in the Quin. over 2. cam 23 fast upon backward. t t

I 'Wliez the slmits y; a see i inne i 1' spec-i 10 mounted in oeziringsin the casing tively 1n the directions indicated by the? t t b th 0f tharrows E F from the position 111 which they may b i d 6;

cjwei'ed in order to are indicated, the cams w 0 being raised; i sdlower b 51 biggks Z. d th 13mm t P fi in Whif'h y -Z shaft (7 so as tolosing both oi the driving sated will raise the tappets 8 '7respectively, h i c (Z out of or into connection with the while the camsw 02, being lowered from the moicy, The (32m 3 i ghQWfiqg W'Qrkggi by PWhiCfl y indimted means of a neool l which thesefor erves 19 t e 1 1 Q 5lmfifiictgil when instead of the pedal ordinarily provided in the Shafts3/ Z ar l P fi Y in ,a. motor-di-iveii vehicle for control of thedirections opposite to those indicated by the connection anddisconnection of the motor E i Cams blng raisedwith and from the drivingwheels and when the position in'wliicii they are indicated will; d i bl11 th dyiying h l $0 1 raise the tappets t and the cams 0) Q1; berim f 7a i E 2 the pOSlilOIlS 111 which y. Means nf'e provided in" which thesome ii affected. If therefore the z'oliel's f be into "which it, .121 4wed from time against: the disks a 5 respectively and contime no 1 some,.1 "nose, in the case illiissequeiitly the gods 0 p are overthe teppetsg 1 i it-{ it respeotii'ely movement of the vriie mined 18 to guide thevehicle to the right liens be accompanied by turning of the its 7 e i inthe directions indieat d o He siroiv's i 7 is "furnished with slottedwith iii upon the opp-er 'igie ii by dogs secured in l i so as to riiiseand.

resp "rtively s ne raising or tsppst by 1 The dogs 23- ciosilfv surroundrods 2 sen vw isr the cum e o no i. 51 L ti e loo 7) Ne d in toobrackets 2o firmly secured to the on'dblook m s M A from the diskmovemens 55 ins wheels i8 to guide the vehieie to me thatv the dog'swhen engaged of the guides 22 "form vfixtures :mtienab :3 fr m 1 limit,the upward movement of the frame h in the adjustment of the springs nbefore the upper part of the case 5 is placed in position. v V v s Ifthe rod 1, being raised to disengage the rollers e ,1 from the disks ab, be raised sufiiciently the dogs 23 will be disengaged from the guides22 and the frame it will be set free to be moved and to be secured bythe dogs 23 being lowered again in any other positionpermitted by theformation of the 3 teeth on the dogs 23 and in the guides 22 and thepositions of the notches or other like means, if any, of securing thelever 21 provided. in the sect-or used with such lever 21 and thus theangular position of the shaft 9 .between the disks a b may beeasilyadjusted.

The upward and downward movement of the blocks theframe h 'efiect'ed bymeans oft-he cams 'u 5' w :12- does not affect the dogs 23. f H 1 v Theis furnished with guidebi'adketsfi'h one'of which is shown detached v inFig. 5 which are placed transversely upon it and provided withsurfacesjinclined upward from thecenter toward eachside to act in themovement of the frame it from its central position toward either-limitof the movement permitted to it, upon bellcrank levers'27, 28, carriedby studs inbrackets 29 secured to the frame it. The, bell-crank levers27, 28,'are provided with short arms to be pressed against the inclinedsurfaces of the brackets 26 respectively'and with long forkedand slottedends engaging the trunnions of collars mounted in grooves surroundingthe--bosses of the rollers e f. In the movementof the frame iz from itscentral position toward either limit ofthe' movement permitted to it thebell-cranlr-levers 27, 28, will be turned respectively i. in thedirections indicated by the arrowsG':H so as to move the rollers e fa'way froihthe'v axes of the'disks a bwh-ile the movement of the framehtoward its central position will allow'springs 39 connected to thelevers 27 28, toturn them respectively in directions opposite to thoseindicated by the arrows G H and cause them to more the rollers e ftoward the axesof the disks a Z). For every x position of engagement ofthe dogs with ygtively to the -Jhe in contact.-

] the guides 22, there is thus a corresponding position of each of therollers e f reladisk a or b with which it may Movement of the lever 21.enables the ratio of the sneedbf thedriving' wheels 0 (lhave been movedout of engagement wit illustrated in the accompanying drawingsapproximately the same extent-in eith nism within it. In order tofacilitate theadjus tmentg' brake drums to to that or the motor to beadjusted very con- 85 veniently and easily, the movementl of the rollerse f radially in relationto the disks a 6 being made easily, because itis only possible for it to be made when the rollers e '70 the disks (1 bby means of the'movement of thev pedal 4 to disengage the dogs 23 fromthe giiides- 22- The pedal 4: is connected to the shaft. 10 by means ofarms 30 and 32 (which are respectively fast on such shaft 10 and a shaft33 carrying the pedal 4e and mounted to be oscillated in the frame ofthe motor driven vehicle) and a rod=3l-$otntiad to the arms 30 and 32. v

Any'other well known or approved means of working or controlling theradial movem entand the lateral movement of the roll ers relatively tothe friction disks may be. employed when desirable instead of. that 1and hereinbefore described. I Thebellrank levers 27, 28, must neces,-sarily be so made and worked that when 1 moved they shall movethe-'rollers igjto' direction. Ln I a The spriiigsm provided topress'gtlie hlocks Z m downifiard in the guidesj k. are m V surroundrods'34 which are. inse e project and are movable at their $1151) I inand through sockets provided'i lithe, frame hand hear at their. lowerend'sin' the blocks Z m and nuts 35, screwed upon the" rods 34, enablethe springs n th be come, pressed to bear as strongly as may herequisiteagainst washers resting on the nuts 35 and against the interiors of thesockets in the frame-h.-

g i v 1 The blocks Z m arefshowmas provided with ball-bearings to carrythe shaftg- 1 As hereinbefore mentioned, the casingQfi serves-to limitthe upward movement of the y frame it by -upivard;ipressure 'due' tq thes T action of the-rollers ie f against the disk a; 5,1 Rollers 36 areirovided-inthe ends of the no upper parts of the box orirame h to bearagainst plates 38 secured jinthe casing, 5, The rollers36'facilitatethemovement of the frame it ,requis'iteto movethe'rollers:ejf between the disks 'a' b by preventingvthe'aupe 115 ward pressureofthesprings n from ca-using i the box or frameto hind orhea'r ex sivelyagainst thegcasing 5; Th' e c esin also serves to excludefiustffrom=therod-5 07? relatively to the tappets' Q eachof the rods 0 79 is formedin,two parts; screwed one into the other and secured in relative positionbylock nuts; t

The shaft 7 as isindi'catedfin-the case of one of ,such!: -sha ftsfin.Eig. l; *carry 1 e conta tt 59f band tor-driven vehicle, drivingwheels, two fric" tion disks respectively in connection with the drivingWheels affording between them a tapering space, rollers to drive suchfrictlon disks, means for carrying the rollers and for .rollers towardand away from the disks,

substantially as hereinbefore described.

' 6. In a transmission mechanism for a motor-driven vehicle, drivingwheels, two friction disks respectively in connection with thedrivingwheels affording between them a taperingspace, rollers for driving thefriction disks, means for carrying such rollers and for moving them fromone disk to the other; whereby they are made to engage alternately withthe one or the'other disk,

bell-crank levers in connection with suchrollers and carried by part ofthe means for carrying. and moving the'rollers and fixed inclines formoving the bell-crank levers during the movement of the rollers towardand away from the disks, substantially as hereinbefore' described.

7. Ina transmission mechanism for a motor-driven vehicle, drivingwheels, two friction disks respectively in connection with thedriving'wheels aflording between them a space, rollers to drive suchfriction disks,

means formoving the rollers from one disk to the other, means for movingthe rollers toward and away from central parts of the friction disks inconnection with the means for moving the rollers from one disk to theother, whereby the movement of either roller in the direction toward oraway from a disk is accompanied by a corresponding movement of suchroller toward or away from a central part of such disk and locking meansfor holding in different positions the means for moving the rollers fromone disk tothe other, substantially as hereinbefore described.

'8. In a transmission mechanism for a mo; tor-driven vehicle, drivingwheels, two friction disks respectively in connection with the drivingwheels affording between them aispace, rollers to drive such frictiondisks,

means for carrying the rollers and for moving them from-onedisk to theother, means for moving the rollers toward and away from central partsof the friction disks in connection with the means for carrying therollers and for moving them from one disk to the other whereby themovement of eitherv roller in the direction 'toward or away from a diskis accompanied by a corresponding movement of such roller toward or awayfrom a central part of such disk, locking means carried bythe saidroller carrying and moving means andrelatively fixedparts in position tobe engaged by the loclring means whereby the roller carrying and movsoing means may be locked'in difierent posi tions, substantially ashereinbefore described." 9. In a transmissionmechanism for amotor-drivenvehicle,- drivin'g wheels, two friction disks respectively in connectionwitli'the driving wheels aii'ording between, them a space, rollers todrive such friction disks, means for carrying such rollers and formoving them from one disk'to the other whereby they may be made toengage alternately with the one or the other disk, means for moving therollers toward and away from central, parts of the friction disks inconnection with the means for carrying the rollers and for moving themfrom one disk to the other whereby the movement of either roller in theY direction toward or away fronr a disk is accompanied by acorresponding movement of such roller toward or away'fro'm a'centralpart of such disk, dogs carried by the roller carrying and moving means,means for 'mov ing the dogs and relatively fixed parts in position to beengaged by the dogs, whereby the roller carrying andmoving means maybelocked in different positions, substantially as hereinbeforedescribed.

10. In a transmission mechanism for a' motor-driven vehicle,-drivingwheels, two friction disks respectively in connection with the drivingWheels affording between them a space, rollers to drive such frictiond1sks,

means for carrying such rollers and for movmg them from one disk to theother, means for moving the rollers toward and away from central partsof the friction disks in 1 connection with the means for carrying andmoving'therollers whereby the movement of either roller in the directiontoward or away from a disk is accompanied by a correspond ing movementof such roller toward or away 110 from a central part of such disk, dogscarried by the roller carrying and moving means,meansjfor moving thedogs, and fixed guides in position to'be engaged by the dogs, 7 wherebythe means for carrying and moving the rollers may be locked in differentpositions, substantially as hereinbefore described.

11. In a transmissionmechanism for a "5 motor-driven vehicle, drivingwheels, two 9 friction disks. respectively in connection withthe'driving wheels affording between them a taperingspace, rollers todrive such friction disks, means for carryingtherollers and for movingthem from one disk to the other disk, bell-crank levers in connectionwith the rollers and carried by part of the means for carrying andmoving the'rollm's, relatively fixed means in position to be engaged byand move the bell-crank levers' by the messes v "F 12. In a transmissionmeehnnism for a mo-' tor-driven vehicle, driving Wheels, two frictiondisks respectively in connection with the driving wheelsaffordingheivveen them a tepering space, rollers to drive such friction disks,means for carrying the rollers and for moving them from one disk to theother, hell-crank levers connection with the rollers and carried by partof the roller carrying and moving means, relatively fixedmeans inposition to he engaged by and move :he hell-crank levers during themovement of the rollers toward and away from the disks, dogs carried bythe roller carrying and moving means, means for moving the dogs andrelatively fixed pnrts'in-position to he engaged by the dogs whereby theroller carrying and moving means may be locked in dilierent positions,substantially herein before described. 4

13. in a transmission mechanism for a. motor-driven vehicle, drivingWheels, two friction disks respective y in connection with the drivingWheels zii'iording between them a tapering space, rollers lo drive suchfrictiondishs, means for carrying the rollers and for movin them fromone disk to the other, hell-cram; lovers in connection with the rollers11- id carried by part of the roller Carrying and movin means.relatively fixed means in position to oeen gngcd by and movethehelhcrank levers during the movement of ihe rollers toward and away fromthe disks, dogs carried hy the roller carrying and moving means, meansfor moving the dogs and fixed guides in position to he engaged dogs,whereby the roller carrying and moving means may locked in differentpositions, snhstsniislly as hereinhei'o're described.

14. In ii ililZllllii tor-driven vehicle, Wheels, two friction disksrespectively in connection with the driving wheels nil orliling betweenthem a tapering spare. rollers to drive such friction (llsh's, means forcarrying the rollers and for moving them from one disk to the other,doors carried by the roller carrying and movu means. means for movingthe dogs and relatively fixed parts in position to be engaged by the(logs whereby the roller carrying and moving means may be locked indiilerent positions, substantially as hereinbefore described,

15. In a transmission mechanism for a mo tor-driven vehicle, drivingwheels, two fric-' lion disks respectively in connection with thedriving wheels affording between -them itaperin'g space, rollers todrive such friction disks, means for carrying the rollers and for movingthem from one disk to the other, dogs carried liy the roller carryingand moving means, means for moving ihe dog and fixed guides in posit-ionto he engaged lay 5h;- dogs, whereby the roller carrying and may ingmeans may he looked in diiiereni. posi tions, substantially ashereinhefi'n'e dos rihed. r 16. In a transmission mechanism for u motor-driven vehicle, driving wheels, tw hie tion disks respectively inconnection wit the driving Wheels aifording between hem i space taperingin a direction iti.--z.wi -iz,== or the a-Xes of the disks, rollers indrive i friction disks, means for inovin" toward and away from cenifz.disks, means for carrying the rollers 7 moving them from one dish to {hew; means for movinghothoi' the rollers at ere transversely both to thedirection of rno o nien't toward nndaway from central part1 of the disksand to the direction of mm ment from one disk to the other and loiltiv-fimeans for holding in diii'erent position 7 roller carrying andmoving means and w) nected with said means for moving bu xjl rollerstransversely at Once, and rels fixed parts in position to be engagedlocking means whereby the means i? ing transversely both of the rollersrin one? will cause them to bo'disengnged from tindisks as said lockingmeans are. disengaged, substantially as hereinbefore described,

17. In a transmission mechanism for a a tor-driven vehicle, drivingWheels, two frio tion disks respectively in connection with the dr' 'ingwheels affording between them a space tapering in a direction transverseto the axes of the disks, rollers to drive the friction disks, means i0"moving the rollers. toward and away from central parts of the disks,means for carrying the rollers and for moving them from one disk to theother, means for moving both of the rollers at oncetransversely both tothe directions of move ment toivardand away from central parts of thedisks and to the direction of move-- went from one disk in the other,dogs for holding in difi'esent positions the roller cor-- rying andmoving means and connected with said means for-moving transversely bothof the rollers at once and relatively fixed parts in position to heengaged by the dogs, Whereby the means for so moving transversely bothof the rollers zit-once will cause them to he disengaged from the disksas solid dogs are disengaged, substantially as hereinberore descrihed.

verse tothe ax es of the' diskseirollers to drive such friction :disks,fmeans for f'mqving the 'rol'lersitoward and away. from central parts ofthe-disks, means for carrying the rollers and formoving themfrom onedisk to the other, means formoving both of the rollers attoncetransversely bothto the direction of movement toward and away from I 5verse to the axes of the disks, rollers to drive central parts ofthedisks. and to the direc- -l9.'In a transmission mechanism for a.

motor driven vehicle, drivin wheels, two friction disksrespectively inconnection with the driving, wheels affording between them a spacetapering in a' direction trans? such friction disks, an 'aizial supportfor the rollers, a frame movable to bring either.

- roller alternately against either friction disk and provided withguides for; the said axial support, means for moving the axial sup I"port in the guides about either of two parts and meansof moving theaxial support as -11 whole in'such guides transversely 'both to the axesof the rollers and to the direction of movement toward and away fromcentral parts of the disks and to the direction of movement from onedisk to the other, wherebyone or other or both rollers may be disengagedand reengaged, substantially as hereinbefore described.

20. In a transmission mechanism for a motor-driven vehicle, drivingwheels, two

friction disks respectively in connection with the driving wheelsafi'ording between them a space tapering in a direction transverse tothe axes-of the disks, rollers to drive such friction disks, an axialsupport for such rollers, a frame movable to bring either rolleralternately against either frictiondisk and provided with guides for thesaid axial support, springs in the frame arranged to press the saidaxial support in the direc-' tion'of the guides,means of moving theaxial support in such'guides about either of two parts. and meansof'moving the axial sup port as a whole in such guides transversely bothto the axes of the rollers and to the di rcction of movement toward andaway from central parts 'ofthe disks and to the direction of movementfrom one disk to the other,

whereby one or other or both rollers may be disengaged and reengaged,substantially as 'hereinbefore described.

21.111 9. transmission mechanism for a motor-driven vehicle, drivingwheels, two

friction 1 disks respectively in connection.

with the driving wheels and canted to afford between them a spacetapering a direction transverse to the axes of the disks,and

rollers to drive such friction disks and movable toward and away fromcentral parts of "the disks and from, one disk to the other and furthermovable separately or.both at once transversely both to thedirection ofmovement toward andaway from the central parts of the disks and. to themovement from one disk to the other,substantially as hereinbeforedescribed. p

22. In ,a transmission mechanism forv a motor-driven vehicle, drivingwheels, two conoidal friction disks respectively in connection ,With'thedriving wheels and afford ing between them a space tapering in-a di--recti'on transvers to the axes of the disks, and rollers to drive suchfriction disks and movable toward and away from. central [parts of thedisks and from one disk to the other and further movable separately orBoth at once transversely both to the direction of movement toward andaway from the centarl 'parts of the disks and to the stantiaJly ashereinbefore described. a 23. in a transmisslon .mechanism for a motordriven vehicle, driving wheels, two

conoidal friction disks respectively in con- 'nection withthe, drivingwheels and canted relatively to one another, afi'ordmg between them aspace tapering in a direction trans.

verse to the axes of the disks, and, rollers to drive sfich frictiondisks and movable toward and away from central parts thereof and fromone disk to the other and further .movablc separately or both at oncetrans-, versely both-to the direction of movement toward and away fromthe central parts of movement from one disk to the other, sub- .e

the disks and to the movement from one disk. I

to the othe r, substantially as hereinbefore described. y, In testimony,that Iclaim the foregoing as my invention, I havesigned my name inpresence of two witnesses, this tenth day of- March, 1909.

" THOMAS FRANCIS EVANS". Witnesses: i HOWARD CHELTHAM,

RUTH M. Wilson.

